Smoke and gas consuming furnace



(No Model.) 2 Sheets-Sheet 2.

H. M. BRADY. SMOKE AND GAS GONSUMING FURNAUE.

N0. 294,007. Patentedf'eb. 26. 1884.

NITED STATES PATENT Ormes.

HENRY M. BRADY, OF DAL'ION, ILLINOIS.

SMOKE-AND GAS CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 294,007, dated February 26, 1884.r

Application filed November 5, 1883. (No model.)

o @ZZ whom it may concern:

Be it known that I, HENRY M. BRADY, of Dalton, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Smoke and Gas Consuming Furnaces, of which the following, in connection with the accompanying drawings, is a specication.

In the drawings, Figure 1 is a longitudinal vertical central section of a boiler-furnace containing my improvements. Fig. 2is asection in the pla-ne of the line x x of Fig. l, viewed in the direction indicated by the arrows there shown. Fig. 3 is a detail showing the slides for regulating the entrance for. cold air. Fig. 4 is a section in the plane of the line m w', viewed from above; and Fig. 5 is a sectional detail showing the air-funnels.

Like letters of reference indicate like parts.

A represents the furnace, and B is the boiler. C is the dome. D,D,and D are bridge walls. E is the fire-box. F is a space or opening over the wall D. G is a like space or arch underneath the wall DV, and His a like space over the wall D. I is -the hot-air chamber. J is a box, made preferably of cast-iron, and located in the wall D. a is a partition dividing the box J intol two compartments, and a c are perforations in the said partition. This box extends at one end through one of the side walls of the furnace, as indicated at Z1 in Figs. 2, 3, and 4, and K K are slides closing the projecting ends lof the said box more or less, as may be desired.' L is a steam-pipe passing from the dome into vone of the chambers of the box J, and that chamber is thereby heated, and may be termed the hot-air chamber77 ofthe said box. The other chamber may be termed the cold-air chamber77 of the said box. These two chambers I have designated by the letters M and N, respectively. In the chamber M are funnels O O, the larger ends or mouths of which are in the said chamber, and the smaller ends of which extend through the outer side of that chamber, as is indicated in Figs. l, 4, and 5. The pipe L passes through the funnels O O, and is closed at its inner end. P P are nipples extending from the pipe L outwardly through the funnels O O.

The furnace is stoked or supplied with coal Ain the usual manner, and after combustion begins the heat, gases, particles of carbon, and other mat-ter there unconsumed pass over the bridge-wall D, under the bridge-wall D', an'd into the chamber Q., between the bridge-wall D and D. In the chamber Qthe' products of combustion referred to meet the horizontal sheet of steam or vapor escaping from the nipples P P, and also meet a blast of air escaping from the funnels O O. The tendency of these steam-jets and of this injection of air is to retard the unconsumed products of combustion in their passage through the furnace, so that they will be exposed longer than otherwise to the action of the heat before escaping. rlhe air also, being supplied at this point, aids combustion by furnishing-a new supply of oxygen. The heat, however, )asses the steam-jetsand airblast and escapes overthe wall D into the chamber I, and passes thence out and throughthe boiler-flues and smokestack and chimney. The result of this tortuous course of the heat and particles which constitute what is commonly termed smoke, and of the impingement upon these particles of the steam and air, before referred to, causes a much more complete combustion of the said particles than would otherwise occur, and the chimney will be comparatively if not entirely smokeless. The escape of steam through the nipples I? I may be regulated by means of a cock in the pipe L, and the entrance of air may be controlled by means of the slides or doors K K, It will be perceived that a volume of air will enter the chamber N directly from the outside ofthe furnace, and pass thence through the perforations a a. into the chamber M, where it becomes heated to a greater or less degree-before passing out through the funnels O O. It will also be perceived tht avolume of air may be admitted directly into the chamber M through its slide or door K, the said air being inducted by suction. v

Having thus described my invention,what I claim as new, and desire to sec-ure by Letters Patent, is-

l. In a boiler-furnace, the combination of the boiler, the fire-grate, the'two bridge-walls with passages thereover, the intermediate bridge-.wall having a passage thereunder, the transverse air-chamber located inthe intermediate wall, means for controlling the ad mission of air into said chamber, and steam- IOO A ejector nozzles located in said chamber, and

longitudinally into two communicating lcompartments, the rear compartment being provided with a steam-pipe and with nozzles, as described, for delivering the air in a backward f direction.

4.The combination, in a furnace, of the `bridge-wall D, having over it the space or inj ector and airsupplying chamber cominuni` eating with the chamber behind the wall D', substantially as and for the purposes set forth.

'5. The combination, in a furnace, ofthe bridgewall D, having over it the space or passage F, the bridge-wall D', having under it the space or passage G, the bridge-wall D, having over it the space or passage H, and the box J, located in the wall D', and containing the chambers N and M, with their slides or doors K K, the said chambers being separated by means of .a perforated partition, and the chamber M containing the injector L P and the funnels O O, substantially as and for the purposes speciied.

' y HENRY M. BRADY.

`Vit11esses:

H. FRANKFURTER, XV. S. BAKER. v 

